import turtle as t
from turtle import *
import random as r
import time


# 定义几个函数先

# 定义画彩灯的函数
def drawlight():
    if r.randint(0, 30) == 0:
        color('tomato')
        circle(6)
    elif r.randint(0, 30) == 1:
        color('orange')
        circle(3)
    else:
        linewidth = 5
        color('dark green')


# 定义画圣诞树的函数
def tree(d, s):
    if d <= 0:  return
    forward(s)
    tree(d - 1, s * .8)
    right(120)
    tree(d - 3, s * .5)
    drawlight()
    right(120)
    tree(d - 3, s * .5)
    right(120)
    backward(s)


# 定义树下面小装饰的函数
def xzs():
    for i in range(200):
        a = 200 - 400 * r.random()
        b = 10 - 20 * r.random()
        up()
        forward(b)
        left(90)
        forward(a)
        down()
        if r.randint(0, 1) == 0:
            color('tomato')
        else:
            color('wheat')
        circle(2)
        up()
        backward(a)
        right(90)
        backward(b)


# 定义一个画雪花的函数
def drawsnow():
    t.hideturtle()
    t.pensize(2)
    for i in range(200):
        t.pencolor("white")
        t.penup()
        t.setx(r.randint(-350, 350))
        t.sety(r.randint(-100, 350))
        t.pendown()
        dens = 6
        snowsize = r.randint(1, 10)
        for j in range(dens):
            t.forward(int(snowsize))
            t.backward(int(snowsize))
            t.right(int(360 / dens))


n = 100.0
t.pensize(10)
speed("fastest")
t.screensize(800, 600, "black")
left(90)
forward(3 * n)
color("orange", "yellow")
begin_fill()
left(126)

# 画五角星
for i in range(5):
    forward(n / 5)
    right(144)
    forward(n / 5)
    left(72)

end_fill()
right(126)

color("dark green")
backward(n * 4.8)

# 调用画树的函数
tree(15, n)
backward(n / 2)

xzs()

# 写文字
t.color("dark red", "red")
t.write("Merry Christmas", align="center", font=("Comic Sans MS", 40, "bold"))

# 调用雪花函数
drawsnow()

t.done()  # 收笔